A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Requirements for ECRTP over MPLS
Author(s) : J. Ash
Filename : draft-ash-avt-ecrtp-over-mpls-reqs-01.txt
Pages : 0
Date : 2004-1-27
VoIP typically uses the encapsulation voice/RTP/UDP/IP. When MPLS
labels are added, this becomes voice/RTP/UDP/IP/MPLS-labels. For an
MPLS VPN, the packet header is at least 48 bytes, while the voice
payload is often no more than 30 bytes, for example. VoIP header
compression can significantly reduce the VoIP overhead through various
compression mechanisms, such as enhanced compressed RTP (ECRTP). We
consider using MPLS to route ECRTP compressed packets over an MPLS LSP
without compression/decompression cycles at each router. Such an ECRTP
over MPLS capability can increase the bandwidth efficiency as well as
processing scalability of the maximum number of simultaneous VoIP flows
that use header compression at each router.
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